From: Stefano Garzarella <sgarzare@redhat.com>
To: Arseny Krasnov <arseny.krasnov@kaspersky.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Jorgen Hansen <jhansen@vmware.com>,
Colin Ian King <colin.king@canonical.com>,
Norbert Slusarek <nslusarek@gmx.net>,
Andra Paraschiv <andraprs@amazon.com>,
kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
stsp2@yandex.ru, oxffffaa@gmail.com
Subject: Re: [RFC PATCH v9 15/19] vhost/vsock: enable SEQPACKET for transport
Date: Thu, 13 May 2021 15:44:37 +0200 [thread overview]
Message-ID: <20210513134437.xwz5gaulse4jqcmm@steredhat> (raw)
In-Reply-To: <20210508163634.3432505-1-arseny.krasnov@kaspersky.com>
On Sat, May 08, 2021 at 07:36:31PM +0300, Arseny Krasnov wrote:
>This removes:
>1) Ignore of non-stream type of packets.
>This adds:
>1) Handling of SEQPACKET bit: if guest sets features with this bit cleared,
> then SOCK_SEQPACKET support will be disabled.
>2) 'seqpacket_allow()' callback.
>3) Handling of SEQ_EOR bit: when vhost places data in buffers of guest's
> rx queue, keep this bit set only when last piece of data is copied.
>
>Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
>---
> v8 -> v9:
> 1) Move 'seqpacket_allow' to 'struct vhost_vsock'.
> 2) Use cpu_to_le32()/le32_to_cpu() to work with 'flags' of packet.
>
> drivers/vhost/vsock.c | 42 +++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 39 insertions(+), 3 deletions(-)
>
>diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
>index 5e78fb719602..3395b25d4a35 100644
>--- a/drivers/vhost/vsock.c
>+++ b/drivers/vhost/vsock.c
>@@ -31,7 +31,8 @@
>
> enum {
> VHOST_VSOCK_FEATURES = VHOST_FEATURES |
>- (1ULL << VIRTIO_F_ACCESS_PLATFORM)
>+ (1ULL << VIRTIO_F_ACCESS_PLATFORM) |
>+ (1ULL << VIRTIO_VSOCK_F_SEQPACKET)
> };
>
> enum {
>@@ -56,6 +57,7 @@ struct vhost_vsock {
> atomic_t queued_replies;
>
> u32 guest_cid;
>+ bool seqpacket_allow;
> };
>
> static u32 vhost_transport_get_local_cid(void)
>@@ -112,6 +114,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
> size_t nbytes;
> size_t iov_len, payload_len;
> int head;
>+ bool restore_flag = false;
>
> spin_lock_bh(&vsock->send_pkt_list_lock);
> if (list_empty(&vsock->send_pkt_list)) {
>@@ -174,6 +177,12 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
> /* Set the correct length in the header */
> pkt->hdr.len = cpu_to_le32(payload_len);
>
>+ if (pkt->off + payload_len < pkt->len &&
>+ le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR) {
>+ pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
>+ restore_flag = true;
>+ }
I think is better to move this code in the same block when we limit
payload_len, something like this (not tested):
/* If the packet is greater than the space available in the
* buffer, we split it using multiple buffers.
*/
if (payload_len > iov_len - sizeof(pkt->hdr)) {
payload_len = iov_len - sizeof(pkt->hdr);
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR) {
pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
restore_flag = true;
}
}
The rest LGTM.
next prev parent reply other threads:[~2021-05-13 13:44 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-08 16:30 [RFC PATCH v9 00/19] virtio/vsock: introduce SOCK_SEQPACKET support Arseny Krasnov
2021-05-08 16:32 ` [RFC PATCH v9 01/19] af_vsock: update functions for connectible socket Arseny Krasnov
2021-05-08 16:32 ` [RFC PATCH v9 02/19] af_vsock: separate wait data loop Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 03/19] af_vsock: separate receive " Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 04/19] af_vsock: implement SEQPACKET receive loop Arseny Krasnov
2021-05-13 11:37 ` Stefano Garzarella
2021-05-13 14:41 ` Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 05/19] af_vsock: implement send logic for SEQPACKET Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 06/19] af_vsock: rest of SEQPACKET support Arseny Krasnov
2021-05-13 11:42 ` Stefano Garzarella
2021-05-08 16:34 ` [RFC PATCH v9 07/19] af_vsock: update comments for stream sockets Arseny Krasnov
2021-05-08 16:34 ` [RFC PATCH v9 08/19] virtio/vsock: set packet's type in virtio_transport_send_pkt_info() Arseny Krasnov
2021-05-08 16:34 ` [RFC PATCH v9 09/19] virtio/vsock: simplify credit update function API Arseny Krasnov
2021-05-08 16:35 ` [RFC PATCH v9 10/19] virtio/vsock: defines and constants for SEQPACKET Arseny Krasnov
2021-05-13 11:45 ` Stefano Garzarella
2021-05-13 14:42 ` Arseny Krasnov
2021-05-08 16:35 ` [RFC PATCH v9 11/19] virtio/vsock: dequeue callback for SOCK_SEQPACKET Arseny Krasnov
2021-05-13 11:58 ` Stefano Garzarella
2021-05-13 14:42 ` Arseny Krasnov
2021-05-13 12:18 ` Stefano Garzarella
2021-05-08 16:35 ` [RFC PATCH v9 12/19] virtio/vsock: add SEQPACKET receive logic Arseny Krasnov
2021-05-13 12:14 ` Stefano Garzarella
2021-05-13 14:43 ` Arseny Krasnov
2021-05-08 16:35 ` [RFC PATCH v9 13/19] virtio/vsock: rest of SOCK_SEQPACKET support Arseny Krasnov
2021-05-13 12:27 ` Stefano Garzarella
2021-05-13 13:03 ` Stefano Garzarella
2021-05-08 16:36 ` [RFC PATCH v9 14/19] virtio/vsock: enable SEQPACKET for transport Arseny Krasnov
2021-05-13 12:49 ` Stefano Garzarella
2021-05-13 14:44 ` Arseny Krasnov
2021-05-08 16:36 ` [RFC PATCH v9 15/19] vhost/vsock: " Arseny Krasnov
2021-05-13 13:44 ` Stefano Garzarella [this message]
2021-05-08 16:36 ` [RFC PATCH v9 16/19] vsock/loopback: " Arseny Krasnov
2021-05-08 16:37 ` [RFC PATCH v9 17/19] vsock_test: add SOCK_SEQPACKET tests Arseny Krasnov
2021-05-13 13:47 ` Stefano Garzarella
2021-05-08 16:37 ` [RFC PATCH v9 18/19] virtio/vsock: update trace event for SEQPACKET Arseny Krasnov
2021-05-08 16:37 ` [RFC PATCH v9 19/19] af_vsock: serialize writes to shared socket Arseny Krasnov
2021-05-13 14:01 ` Stefano Garzarella
2021-05-13 14:45 ` Arseny Krasnov
2021-05-13 14:46 ` Stefano Garzarella
2021-05-13 14:48 ` Arseny Krasnov
2021-05-13 15:41 ` Stefano Garzarella
2021-05-13 14:51 ` Arseny Krasnov
2021-05-13 14:10 ` [RFC PATCH v9 00/19] virtio/vsock: introduce SOCK_SEQPACKET support Stefano Garzarella
2021-05-13 14:46 ` Arseny Krasnov
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